Added 🇫🇷 documentation for wallabag backup

docs/de/index.rst

@@ -45,6 +45,7 @@ Die Dokumentation ist in anderen Sprachen verfügbar :
    user/tags
    user/android
    user/parameters
+   user/backup
 
 .. _dev-docs:
 

docs/de/user/backup.rst

@@ -0,0 +1,25 @@
+Backup wallabag
+===============
+Because sometimes you may do a mistake with your wallabag and lose data or in case you need to move your wallabag to another server you want to backup your data.
+This articles describes what you need to backup.
+
+Basic settings
+--------------
+wallabag stores some basic parameters (like SMTP server or database backend) in the file `app/config/parameters.yml`.
+
+Database
+--------
+As wallabag supports different kinds of database, the way to perform the backup depends on the database you use, so you need to refer to the vendor documentation.
+
+Here's some examples:
+
+- MySQL: http://dev.mysql.com/doc/refman/5.7/en/backup-methods.html
+- PostgreSQL: https://www.postgresql.org/docs/current/static/backup.html
+
+SQLite
+~~~~~~
+To backup the SQLite database, you just need to copy the directory `data/db` from the wallabag application directory.
+
+Images
+------
+The images retrieved by wallabag are stored under `data/assets/images` (the images storage will be implemented in wallabag 2.2).